Mousaka - cooking recipe

Ingredients

8 long narrow eggplants (or 5 or 6 medium size)
extra virgin olive oil, for greasing pan and brushing eggplant
2 c. chopped onion*
1/4 c. water **
3 Tbsp. extra virgin olive oil
3 lb. very lean ground beef or ground lamb (twice ground)***
1/2 tsp. salt ****
fresh ground pepper, to taste (I added 4 cloves garlic, crushed)
1/4 tsp. nutmeg (I didn't use)
1/2 tsp. cinnamon (I didn't use)
1 tsp. sugar (I didn't use)
2 Tbsp. butter, plus 4 Tbsp for topping (I used salted butter)
1 (15 oz) can tomato sauce*****
1/2 lb. Parmesan or Romano cheese, freshly grated******
12 to 14 Royal (or any brand) milk biscuits finely crushed or cracker meal*******
11 large eggs
1 c. milk (I used skim milk)

Preparation

*(I used 2 to 3 inch diameter onions & 2 bunches of green onions.) (I added 2 cups chopped celery.)